42 THE AMERICAN MIDLAND NATURALIST 



base, the old culms stramineous, shining; infranodes glabrous; 

 nodes glabrous; leaves numerous, short, narrow, the larger 5-7 

 dm. long, the upper reduced to 1-2 dm.; principal nerves of the 

 larger leaves 7-9; panicles terminal on the culms and branches, 

 and from all the upper and middle sheaths, numerous, very slender, 

 short, the divisions appressed, the terminal and those terminating 

 the branches usually short-cxserted, those from the lowest sheaths 

 usually long-exserted on very slender peduncles; spikelets 3mm. 

 long, rather slender; glumes broadly lanceolate, attenuate or cuspi- 

 date, about one-half as long as the lemma; lemmas lanceolate, 

 awned, minutely bearded at the base, sometimes awnless or short- 

 awned; awns slender, about as long as the lemmas or sometimes 

 shorter. 



Type specimens collected at Webb City, Missouri, Palmer 2734, 

 September 20, 1909, specimens in the Herbarium of the Missouri 

 Botanical Garden, sheet No. 757387. 



The species here proposed has been referred to M. Torreyi on the 

 one hand and to M. tenuiflora on the other, but differs conspicuously 

 from these species in being lower, more branched, in having more 

 numerous leaves which are shorter and narrower, with but 7-9 

 principal nerves, in having numerous panicles, which are mostly 

 short-exserted, in having glabrous yellow polished infranodes and 

 glabrous nodes. It is much nearer M. Mexicana, to which it bears a 

 strong resemblance, but differs in having shorter and broader 

 glumes, awned lemmas, and long-exserted panicles from the lower 

 sheaths. 

 Specimens Examined: 



Missouri : 



Golden City, Palmer 4575, October 6, 1913, M. B. G. Herb. 



No. 717221 ; 

 Webb Cit}', Palmer 2734, September 20, 1909, M. B. G. Herb. 



No. 757387, TYPE; 

 Webb City, Palmer 2734, vSeptcmber 20, 1909, M. B. G. Herb. 

 No. 80062, TYPE collection. 



Illinois: 



Bluffs Lake, Eggert, September 24, r875, M. B. G. Herb. No. 



79733- 



5. MUHLENBERGIA TENUIFLORA (WiUd.) B. S. P. Cat. Pi. 



N. Y. 67, 1888. 



Agrostis tenuiflora Willd. Sp. PI. 1:364, 1787. 



